ALMATY( Reuters)-The central Asian nations of Kazakhstan, Uzbekistan and Kyrgyzstan suffered electrical power outages in major cities on Tuesday, according to authorities and residents, after a major power line in Kazakhstan was disconnected. The grids of the three ex-Soviet republics are interconnected, and via Kazakhstan are linked to the Russian power grid which they can use to cover unexpected shortages. But Kazakhstan's North-South power line, which links densely populated southern Kazakhst